EN ISO 18276:2024 PDF

Overview

EN ISO 18276:2024 (CEN adoption of ISO 18276:2024) defines the classification of tubular cored electrodes used for gas‑shielded and non‑gas‑shielded metal arc welding of high‑strength steels. It applies to weld metals in the as‑welded or post‑weld heat‑treated (PWHT) condition where parent or weld metal strength exceeds 550 MPa (yield) or 590 MPa (tensile). The standard replaces EN ISO 18276:2017 and is intended for use across Europe and internationally.

Key topics and requirements

• Two classification systems
  • System A: Classification based on yield strength and an average impact energy of 47 J (all‑weld metal).
  • System B: Classification based on tensile strength and an average impact energy of 27 J (all‑weld metal).
• Symbols and designation: Standardizes symbols for tensile/impact properties, chemical composition, electrode core type, shielding gas, welding position, hydrogen content and PWHT condition.
• Shielding gas flexibility: A single tubular cored electrode may be tested and classified for use with multiple shielding gases.
• Testing and verification
  • Mechanical tests (tensile, impact) and chemical analysis of all‑weld metal are specified.
  • Rounding rules and retesting procedures are included.
  • Pulsed current is acknowledged as affecting electrode behaviour but is not used for classification.
• Delivery and documentation: Defines technical delivery conditions and includes designation examples for procurement and QA.

Practical applications

• Who uses it
  • Welding engineers and welding procedure specification (WPS) authors
  • Consumable manufacturers and suppliers of tubular cored electrodes
  • QA/QC inspectors, specifiers and procurement teams in construction, heavy fabrication, pipeline, shipbuilding and offshore industries
• Why it matters
  • Ensures consistent selection and traceability of electrodes for welding high‑strength steels.
  • Facilitates compliance with project specifications that require defined weld metal strength and toughness (impact energy) levels.
  • Helps match electrode performance (yield/tensile and impact properties) to parent material and service conditions, including PWHT requirements.

Related standards

• EN ISO 18276:2024 supersedes EN ISO 18276:2017.
• Refer to ISO/TC 44 (Welding and allied processes) and national CEN member bodies for complementary standards on welding consumables, welding procedure qualification and hydrogen control.

Keywords: EN ISO 18276:2024, tubular cored electrodes, welding consumables, high‑strength steels, classification, yield strength, tensile strength, impact energy, shielding gas, PWHT.